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Article Dans Une Revue Colloids and Surfaces A: Physicochemical and Engineering Aspects Année : 2013

Organo-apatites for lead removal from aqueous solutions: A comparison between carboxylic acid and aminophosphonate surface modification

Résumé

Organo-apatites were prepared by in situ incorporation of adipic acid, citric acid and nitrilotris(methylene)triphosphonic acid. The resulting powders consist of poorly-crystalline nanosized apatites with organic content in the 2-8 wt% range. All materials exhibit faster sorption rate and higher sorption capacity for Pb2+ in acidic solutions compared to the pure apatite. This is especially true for carboxylate-modified powders that exhibit the highest-to-date maximum lead sorption capacity (approximate to gg(-1)). These properties can be correlated with the ability of introduced organic moieties to modify the acido-basic properties of the material surface and to form stable complexes with Pb2+.
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hal-01461412 , version 1 (14-11-2019)

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Sanaa Saoiabi, Karima Achelhi, Sylvie Masse, Ahmed Saoiabi, Abdelaziz Laghzizil, et al.. Organo-apatites for lead removal from aqueous solutions: A comparison between carboxylic acid and aminophosphonate surface modification. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2013, 419, pp.180-185. ⟨10.1016/j.colsurfa.2012.12.005⟩. ⟨hal-01461412⟩
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